string-plumbing/concat

#!/bin/sh
. "$(dirname "$0")/_/husky.sh"

function ask () {

    # This is a general-purpose function to ask Yes/No questions in Bash, either
    # with or without a default answer. It keeps repeating the question until it
    # gets a valid answer.

    # http://djm.me/ask

    if [ "${2:-}" = "Y" ]; then
        prompt="Y/n"
        default=Y
    elif [ "${2:-}" = "N" ]; then
        prompt="y/N"
        default=N
    else
        prompt="y/n"
        default=
    fi

    while true; do

        # Ask the question (not using "read -p" as it uses stderr not stdout)
        echo -n "$1 [$prompt] "

        # Read the answer (use /dev/tty in case stdin is redirected from somewhere else)
        read REPLY </dev/tty

        # Default?
        if [ -z "$REPLY" ]; then
            REPLY=$default
        fi

        # Check if the reply is valid
        case "$REPLY" in
            Y*|y*) return 0 ;;
            N*|n*) return 1 ;;
        esac

    done

}

while ! npm run commit-msg -- "$1" ; do
    if [ -t 1 ] && ask 'There was an error. Do you wish to amend your commit message?' Y ; then
        ${GIT_EDITOR:-$EDITOR} "$1" < /dev/tty
    else
        exit 1
    fi
done